Treatment apparatus for operatively correcting defective vision of an eye, method for generating control data therefor, and method for operatively correcting defective vision of an eye

A method for generating control data for a laser device of a treatment apparatus for surgical correction of hyperopia in an eye, wherein the laser device comprises a laser, optics and a 3D focus shifting device, wherein the laser device is controlled by a control device and separates corneal tissue of the eye by applying laser radiation,

• wherein the control data controls an operation of the laser device to emit the laser radiation into the cornea at different focus positions wherein the controlled operation of the laser device isolates a lenticular shaped volume in the cornea, the lenticular volume being structured such that removal of the volume effects a desired correction of hyperopia;
• wherein the method further comprises:
• generating a set of control data and storing the set of control data in a memory, the generating comprising
• defining the lenticular volume to have a posterior face and an anterior face, wherein the posterior face and the anterior face have borders that are connected via an edge face, the edge face having, in projection along an optical axis of the eye, an extension that is, when seen in the projection along the optical axis of the eye in a plane perpendicular to the optical axis of the eye, larger than a hypothetical extension of one of the following two hypothetical lines:
• a straight line extending perpendicularly from the border of the posterior face and connecting to the anterior face or to an imaginary continuation of the anterior face;
• and
• a straight line extending perpendicularly from the border of the anterior face and connecting to the posterior face or to an imaginary continuation of the posterior face.

A method for surgical correction of hyperopia in an eye, comprising:

• separating corneal tissue by applying a laser radiation and isolating a lenticular volume thereby;
• removing the isolated lenticular volume from within the cornea, the removal of the lenticular volume effecting a desired correction of hyperopia, the method further comprising:
• isolating the lenticular volume to have a posterior face and an anterior face, wherein the posterior face and the anterior face have borders that are connected via an edge face, the edge face having, in projection along an optical axis of the eye, an extension that is, when seen in the projection along the optical axis of the eye in a plane perpendicular to the optical axis of the eye, larger than a hypothetical extension of one of the following two hypothetical lines:
• a straight line extending perpendicularly from the border of the posterior face and connecting to the anterior face or to an imaginary continuation of the anterior face;
• and
• a straight line extending perpendicularly from the border of the anterior face and connecting to the posterior face or to an imaginary continuation of the posterior face.